Question

mole fraction of water in an aqueous solution of 10% glucose is​

Answer 1

ANSWER

10% w/w solution of glucose in water means that 10 g of glucose is present in 100 g of the solution i.e., 10 g of glucose is present in (100−10)g=90 g of water.

Molar mass of glucose (C6H12O6)

=6×12+12×1+6×16=180 gmol(-1)

Then, number of moles of glucose =10/180mol

=0.056 mol

Number of moles of water = 90/18mol(-1)

=5 mol

Mole fraction of glucose (X)= 0.056/(0.056+5)

=0.011